MSM518200 Datasheet, PDF (9/17 Pages) OKI electronic componets – 4,194,304-Word X 2-Bit DYNAMIC RAM : FAST PAGE MODE TYPE

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MSM518200
Notes concerning CAS1 and CAS2 control
Overlap the active-low timings of CAS1 and CAS2. Skew between CAS1 and CAS2 is allowed
under the following conditions:
(1) The timing specification for CAS1 and CAS2 should be met individually.
(2) Different operation modes for CAS1/CAS2 are not allowed (as shown below).
RAS
CAS1
Delayed write
CAS2
Early write
WE
(3) Closely separated CAS1/CAS2 control is not allowed. However, when the condition
(t_CP ≤ t_UL) is satisfied, fast page mode can be performed.
RAS
CAS1
CAS2
t_UL
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